William a



W. A. SMITH.

PERCUSSIVE TOOL.

APPLICATION men APR.19. 19m.

Patented Aug. 5,1919.

I {wil JNVENTOR.

Q a I B X /ATT NEYS.

TED STATES PATENT OFFICE.

WILLIAM A. SMITH, OF EASTON, PENNSYLVANIA, ASSIGNOR T0 INGERSOLL-RAN'D COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

rnncusslvn' TOOL.

Specification of Letters Patent.

Patented Aug. 5, I919.

motor independent of the percussive element to provide rotation to the drill or other tool.

The objects of the present invention are to provide a tool of the above type in which the rotating motor is attached at one side of the cylinder body of the tool so that it may readily be dis-assembled and replaced in positionin the drill without dis-assembling the other parts of the tool, to provide a casing 'in which all the rotating parts of the tool are contained which will be com- I pact and permit simple means for-connecting the rotating motor to the drill steel, as, for instance, by means of spur gears.

A further object of the invention is to provide a rotating chuck for the drill steel provided with a gear meshing with other gears intermediate the drill steel and rotating motor, the gear being formed on a collar by meansof which the parts of the chuck are securely held together.

'VVtith these and other'objects in view my invention consists in the features of construction and operation set forth in the following description and illustrated in the accompanying drawings, forming a part hereof, in which Figure 1 shows a longitudinal view of the drill, parts being broken away to more clearly show the construction;

Fig. 2; a view of the outside of a portion of the drill cylinder; and

Fig. 3, a cross-sectional view of the rotating motor taken on the line 33 of Fig. 1.

Referring more particularly to the drawings, 1 shows the cylinder body of a percussive tool built in accordance with the present invention. This cylinder body 1 extends from the back head 2 of the tool to the front head 3 in one integral part, the forward portion of which is somewhat reduced in size and is provided with conduits by means of which the piston 5 is reciprocated within its cylinder in a well known manner.

Clamped to the cylinder body 1 of the tool by means of set screws 6 is a rotatingmotor casing 7 in which are contained the spur gears 8 meshing together, which form the retating motor, the axes of these cars '7 and 8 extending longitudinally of t 6 cylinder.

In advance of the motor casing 7 is the spacing member 9 fastened to the motor casing 7 by means of bolts 10. This spacin member 9 serves to close the forward on of the motor casing 7 and also provides a part of the space required for the reducing gears'12 and 13. Through the spacing member 9 0x tends a shaft 11, extending longitudinally of the cylinder which is keyed to one of the gears 8 and at the forward end of this shaft 11 is a pinion gear 12 also fastened to the shaft 11 by any suitable means. Roller bearings are provided in which rotate the shafts upon which the gears 8 are mounted.

The rearward roller bearings are contained provided with a gear 14 which in turnmeshes with the gear 15 provided on the rotating chuck 16. A conduit 17 extending from the fluid supply with a conduit 18 within the motor casing 7- for supplying fluid to the motor and an exhaust opening'lt) permits the fluid after operating the motor to be admitted to the extreme forward end of the cylinder base 20 fromwhich it may pass through the central hole 21 provided in the drill steel 22 to the bottom of the hole being drilled to expel the chips. y

The rotating chuck 16 is made up of but three parts rigidly held together to'form a simple unitary construction. parts are the chuck itself 16 which is proof the tool connects- These three vided with a hole throughout its len h for i the drill steel 22 and also slots 23 or the accommodation of the usual lugs 24- with which the drill steel 22 is provided. Fittin within the rearward portion of the ohuc 16 is a sleeve 25 havin a hole throughout its length through whic passes the shank 26 which/the chuck 16 is rotated.

' 7 Irsimple,

? are included within the spirit and scope of claims.

Upim outer face of the collar 28 are provided' gear teeth which mesh with'the gear 14 as explained above, and by means of From theabove it will be seen that a been provided whereby a percussive drill having independent cans for rotating is form d all of the rotating parts of which arewithin the casing 7, the spacing member 9, and front head.

It 'is tovbe understood that the present showing and description disclose only one s eclfic embodiment 'o-i'the present inven- .tion,"

and that other forms and: modifications the invention, as expressed 1n the appended at 1 claim is;

a; 1.111 a cylinder for percussive tools, in

, combination, a cylinder body, a motor casing bolted thereto at one side of said cylinder body, a spacing member attached to said mo- I ing a reduced front iorward end and a front tor casing at its spacing member and cylinhead joining said der body. a

2. In a cy inder for percussive tools, hav portion, in combination, a cylinder body, a motor casing bolted thereto at its forward reduced portion, a spacin member attached to said motor easing at i'sforwardend and a front head joining said spacing member and cylinder body.

3. In a cylinder for percussive tools, in combination, a cylinder body, a motor casing bolted thereto at body, a pair of spur gears contained within I said motor casing comprising a rotating 'motor, a spacing-member attached tov said motor casing at its front end'randa front head compact and convenient device has tools, in combination,

one side of said cylinder.

emme joining said spacing member and cylinder body, said spacing member and front head containing'a reducing gear fastened to motor and meshing with a rotating chuck within said front head,

l. In a cylinder for percussive 'tools, in combination, a cylinder body, a motor casing bolted thereto at one side of saideylinder body, 'a pair of spur gears contained Within said motor casing comprising a rotating motor, the'axes of said gears extending longitudinal! a spacing member attached to said motor casing at its front end and a front head joining said spacing member and cylinder body, said spacing member and said front head containing a reducing gear fasfor percussive in combination, a sleeve adapted to the shank of a drill steel, a front sleeve adapted to engage a drill steel, said first mentioned sleeve having a flange, an

a collar provided with a gear on its outer face and threaded to said engaging the flange of said first mentioned front sleeve and I sleeve whereby said sleeves "and collar are held firmly together.

In testimony whereof, I

have hereunto set my hand. p ,WILLIAM A. SMITH. 

